I have Honda EU3000is. It has been on several field days, and several VHF+
mountaintopping events over a period of about 10 years. No RFI noticed.
Bob N2SCJ
-----Original Message-----
From: RFI [mailto:rfi-bounces+n2scj-lists=outlook.com@contesting.com] On Behalf
Of Don
Sent: Sunday, September 20, 2020 7:49 PM
To: rfi@contesting.com
Subject: [RFI] Fwd: Re: Inverters?
I have a Honda EU2000ic and an EC2200i and have had almost no RFI from them.
Almost, because I had a coax ran outside the camper about 30' to a antenna in a
tree, and the extension cord went right beside the coax, and it coupled some
noise in on 40 and 75 meters. As soon as I separated the two, I had no more
problems. I have not worked 160 with it.
I ran on the EU2000 for 6 days solid at the house when an ice storm took the
power lines down, and I had the best time on HF, because all the neighbors
noise makers were off. Power came back on and I had S3 noise back.
-------- Forwarded Message --------
Subject: Re: [RFI] Inverters?
Date: Sun, 20 Sep 2020 12:18:01 -0400
From: Charles Gallo <charlie@thegallos.com>
To: rfi@contesting.com
I have an EU 2000. Only place I can hear it (I’ve tried a few different
setups) is on 80m (note: not tried on 160) Took the extension cord for it, put
a few (4? Would have to look) through a type 43, and then it was VERY hard to
detect. I’ve been very tempted to open it up, and put the ferites right before
the outlet, but haven’t
-- 73 de KG2V
Charlie
> On Sep 20, 2020, at 12:10 PM, Kimo Chun <kimochun@gmail.com> wrote:
>
> All good advice. It is safe to assume that virtually all inverter
> generators generate rfi noise. It is safe to assume that the bulk of
> their market/customer doesn't care about or need clean outputs so they
> don't care either. I used to have one of the last generation of
> completely shrouded conventional Honda generators EX3300. It was
> stolen. I wish I had it now.
> Honda doesn't make them anymore. Too bad.
>
> Though I have not tested newer delivered models, the original EU1000
> and larger models all generate RFI. It was more prevalent/noticeable
> on lower frequency bands, say 20m and lower. I have one EU1000 that
> was modified by a top notch engineer/ham friend to minimize this. I
> don't have the details nor have I taken it apart to learn what was
> done. I just bought it off him as he was moving. We've successfully
> used homebrew inline common mode chokes using Type 31 cores on AC
> extensions leaving the generators that have worked OK. No, I didn't do
> measurement tests (I could) but it was fine for our Field Day
> operations. For a fixed, longer term situation more testing would be
> in order. A friend bought a Honda 7kw model that had the same problem.
> I don't know if he was similarly successful. I didn't follow up.
> If you want to circumvent this issue purchase a conventional generator
> and stay away from inverter types. Otherwise, be prepared to clean it
> up yourself.
>
> The other issue people don't pay attention to is generator design and
> application. None of the typical home power backup generators
> (Generac,
> etc.) offered are for continuous - off grid use. You can use them for
> some hours per day or perhaps for a few days (see their instructions)
> at a time. If you are looking for near continuous power after a
> hurricane for possibly a few weeks (your fuel problem notwithstanding)
> you need a much better, different generator designed for that. It will
> often run at lower RPM and have other heavy duty design features which
> require significant monitoring and maintenance.
> Or use their commonly sold one and pray and accept their failure. Say,
> purchase a new one after each major use, assuming it did last through
> that event. Perhaps a viable risk.
>
> 73, Aloha
> Kimo Chun KH7U
>
>
>
> Date: Sun, 20 Sep 2020 06:46:45 -0700
> From: Dave Cole <dave@nk7z.net>
> To: rfi@contesting.com
> Subject: Re: [RFI] Inverters?
> Message-ID: <58123b6c-8262-97ab-1929-dfb0c78f0b51@nk7z.net>
> Content-Type: text/plain; charset=utf-8; format=flowed
>
> The best test is to bring a portable shortwave radio, and listen
> before you buy... Most places, have a demo generator set up.Make it
> clear to the vendor that if the unit is generating RFI you will be
> returning it, with the expectation of a full refund.
>
> 73, and thanks,
> Dave (NK7Z)
> https://www.nk7z.net
> ARRL Volunteer Examiner
> ARRL Technical Specialist, RFI
> ARRL Asst. Director, NW Division, Technical Resources
>
>> On 9/19/20 9:23 PM, Warren Wolff via RFI wrote:
>> ? I am considering the purchase of an emergency back-upgenerator.?
>> For
> the first time, I have encountered unitstagged as ?inverters?.? Does
> this mean that some systemsare AC generators while the ?Inverter-types?
> generateDC and then convert it to AC?? ? ?Inverter?
> immediatelyprecipitates
> the worry of RFI.? Comments, please.
>> WarrenW7WY
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